... not to mention when things are left blank because a pair has no agreement.
There are a number of posts here that actually make me wonder whether all the posters understand how low level bridge is played. We had a long argument when various people said nobody played a 2
♠ response to Stayman as possible with both majors. It became obvious that they meant no-one who plays a scientific approach. We even had someone who said he had played bridge for 20 years and none of his opponents had ever played that in his time. Yeah, right, he checked in every case.
Perhaps people should realise there are a lot of people in clubs, probably a majority, who make some basic agreements, but do not go farther. People here and elsewhere are often surprised that players assume 1NT - 2
♦ - 2
♥ - 3
♦ shows diamonds, not hearts. They do not realise that for a lot of players
there is no such thing as showing two suits via a transfer. They have never done it, they would never do it, so they do not do it, so they do not recognise a partner who does it. Similarly they do not show controls, so a new suit after a major is agreed is meaningless: if pushed they will tell you they are taking it as natural.
If people are going to give correct rulings, especially in clubs, we need a more tolerant approach to the unscientific lesser player, what are called on RGB "permanent novices". They may have been playing for forty years but they still do not understand much of what goes on.
For such players many sequences are not agreed, even ones that most of the posters here think come under general bridge knowledge.